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Have you verified that the engine, cab and frame are properly grounded to the battery?
have you taken the firewall connector off yet? check the connection there also
I assume you replaced the parts listed in your second post, chasing this complaint. Stop throwing parts at it! If I'm tracking with you, when you turn too many appliances ON the voltage available to those appliances drops off toward zero. Are all of the electrical appliances in the truck affected, or is it limited to a particular area of the truck (e.g., dash and cab interior only, exterior lights, just certain accessories, etc)? Do you have a test light? Do you have a voltmeter? Do you know how to make voltage drop tests and what they indicate?Have you verified that the engine, cab and frame are properly grounded to the battery?So we don't confuse each other, it sounds more like you're describing excessive resistance buildup in a circuit (a partial open or poor connection) than a short. As zieg recommended, check your battery cables and cable connections first. Then move on to the questions listed.
On the ground idea. Guess I could add some more. Can never have enough. I have the small one from the Neg Batt cable to radiator support. Neg Batt cable to alternator, ground strap to firewall and that's it what else do I need? Again thanks :-)
Quote from: 454Man on August 07, 2013, 07:47:18 AMOn the ground idea. Guess I could add some more. Can never have enough. I have the small one from the Neg Batt cable to radiator support. Neg Batt cable to alternator, ground strap to firewall and that's it what else do I need? Again thanks :-)You're missing one. There should also be a ground strap from the front of the driver's side head of the engine to the frame rail.
10si Did not unplug the alternator. Won't that fry it?Full- fielding?
Same problem 2 new alternators. Connector at alternator is new.
I'll post a pic after work just don't makeFinn of my birds nest lol